Smart antenna assembly

Abstract

A smart antenna assembly includes a first smart antenna device including a first polarization antenna, a second polarization antenna, a first switch unit, a first control terminal and a second control terminal. The first polarization antenna includes a first antenna, a first reflection element and a second reflection element. The second polarization antenna includes a second antenna, a third reflection element and a fourth reflection element. The first switch unit includes a first switch element electrically connected with the first reflection element, a second switch element electrically connected with the second reflection element, a third switch element electrically connected with the third reflection element, and a fourth switch element electrically connected with the fourth reflection element. The first control terminal is used to turn on the first and third switch elements. The second control terminal is used to turn on the second and fourth switch elements.

What is claimed is: 
     
       1. An antenna assembly, comprising:
 a first antenna device including: 
 a first substrate; 
 a second substrate, substantially perpendicular to the second substrate; 
 a first polarization antenna disposed on the first substrate, including: 
 a first antenna; 
 a first reflection element disposed on a first side of the first antenna; and 
 a second reflection element disposed on a second side of the first antenna; 
 a second polarization antenna disposed on the second substrate, including: 
 a second antenna; 
 a third reflection element disposed on a third side of the second antenna; and 
 a fourth reflection element disposed on a fourth side of the second antenna; 
 a first switch unit, including: 
 a first switch element electrically connected to the first reflection element; 
 a second switch element electrically connected to the second reflection element; 
 a third switch element electrically connected to the third reflection element; and 
 a fourth switch element electrically connected to the fourth reflection element; 
 a first control terminal for turning on the first switch element and the third switch element; and 
 a second control terminal for turning on the second switch element and the fourth switch element. 
 
     
     
       2. The antenna assembly according to  claim 1 , wherein the first reflection element includes a first section and a second section, and the first switch element is electrically connected between the first section and the second section;
 wherein the second reflection element includes a third section and a fourth section, and the second switch element is electrically connected between the third section and the fourth section; 
 wherein the third reflection element includes a fifth section and a sixth section, and the third switch element is electrically connected between the fifth section and the sixth section; 
 wherein the fourth reflection element includes a seventh section and an eighth section, and the fourth switch element is electrically connected between the seventh section and the eighth section; 
 wherein the first control terminal is electrically connected to the first section of the first reflection element, the first section of the first reflection element is electrically connected to an anode of the first switch element, a cathode of the first switch element is electrically connected to the second section of the first reflection element, the first section of the first reflection element is electrically connected to the fifth section of the third reflection element, the fifth section of the third reflection element is electrically connected to an anode of the third switch element, and a cathode of the third switch element is electrically connected to the sixth section of the third reflection element; and 
 wherein the second control terminal is electrically connected to the third section of the second reflection element, the third section of the second reflection element is electrically connected to an anode of the second switch element, a cathode of the second switch element is electrically connected to the fourth section of the second reflection element, the third section of the second reflection element is electrically connected to the seventh section of the fourth reflection element, the seventh section of the fourth reflection element is electrically connected to an anode of the fourth switch element, and a cathode of the fourth switch element is electrically connected to the eighth section of the fourth reflection element. 
 
     
     
       3. The antenna assembly according to  claim 2 ,
 wherein the first antenna further includes: 
 a first radiating portion; 
 a second radiating portion, electrically connected to the second section of the first reflection element and the fourth section of the second reflection element; and 
 a first feeding element, configured to receive a first radio frequency signal and disposed between the first radiating portion and the second radiating portion; and 
 wherein the second antenna further includes: 
 a third radiating portion; 
 a fourth radiating portion, electrically connected to the sixth section of the third reflection element and the eighth section of the fourth reflection element; and 
 a second feeding element, configured to receive a second radio frequency signal and disposed between the third radiating portion and the fourth radiating portion. 
 
     
     
       4. The antenna assembly according to  claim 1 , further comprising a second antenna device including:
 a third polarization antenna, including: 
 a third antenna; 
 a fifth reflection element disposed on a fifth side of the third antenna; and 
 a sixth reflection element disposed on a sixth side of the third antenna; 
 a fourth polarization antenna, including: 
 a fourth antenna; 
 a seventh reflection element disposed on a seventh side of the fourth antenna; and 
 an eighth reflection element disposed on an eighth side of the fourth antenna; 
 a second switch unit, including: 
 a fifth switch element electrically connected to the fifth reflection element; 
 a sixth switch element electrically connected to the sixth reflection element; 
 a seventh switch element electrically connected to the seventh reflection element; and 
 an eighth switch element electrically connected to the eighth reflection element; 
 a third control terminal for turning on the fifth switch element and the seventh switch element; and 
 a fourth control terminal for turning on the sixth switch element and the eighth switch element. 
 
     
     
       5. The antenna assembly according to  claim 4 , wherein one of the first control terminal and the second control terminal is configured to output a first direct current signal, and one of the third control terminal and the fourth control terminal is configured to output a second direct current signal. 
     
     
       6. The antenna assembly according to  claim 5 , further comprising:
 a radio frequency circuit; and 
 a switching circuit, electrically connected to the radio frequency circuit and configured to transmit a control signal; 
 wherein the switching circuit is electrically connected to the first polarization antenna, the second polarization antenna, the third polarization antenna and the fourth polarization antenna, and is configured to: 
 receive the control signal from the radio frequency circuit; 
 select one of the first polarization antenna and the second polarization antenna according to the control signal; 
 in response to selecting the first polarization antenna, transmit a first radio frequency signal to the first polarization antenna; 
 in response to selecting the second polarization antenna, transmit a second radio frequency signal to the second polarization antenna; 
 select one of the third polarization antenna and the fourth polarization antenna according to the control signal; 
 in response to selecting the third polarization antenna, transmit a third radio frequency signal to the third polarization antenna; and 
 in response to selecting the fourth polarization antenna, transmit a fourth radio frequency signal to the fourth polarization antenna. 
 
     
     
       7. The antenna assembly according to  claim 4 , further comprising a a third substrate and a fourth substrate,
 wherein the third polarization antenna is disposed on the third substrate, and the fourth polarization antenna is disposed on the fourth substrate; and 
 wherein the third substrate is substantially perpendicular to the fourth substrate, the first substrate is substantially parallel to the third substrate, and the second substrate is substantially perpendicular to the fourth substrate. 
 
     
     
       8. The antenna assembly according to  claim 4 , wherein a polarization direction of the first polarization antenna is substantially orthogonal to a polarization direction of the second polarization antenna, and a polarization direction of the third polarization antenna is substantially orthogonal to a polarization direction of the fourth polarization antenna; and
 wherein the polarization direction of the first polarization antenna is substantially the same as the polarization direction of the third polarization antenna, and the polarization direction of the second polarization antenna is substantially the same as the polarization direction of the fourth polarization antenna. 
 
     
     
       9. The antenna assembly according to  claim 4 , wherein a distance from a center of symmetry of the first antenna device to a center of symmetry of the second antenna device is defined as an electrical length, and the electrical length equals to a wavelength of a lowest operating frequency in an operating frequency band where the antenna assembly operates. 
     
     
       10. The antenna assembly according to  claim 4 , wherein in response to the first switch element and the third switch element being turned on by the first control terminal and the switching circuit selecting one of the first polarization antenna and the second polarization antenna, a radiation pattern of the first antenna device directs to a first direction;
 wherein in response to the second switch element and the fourth switch element being turned on by the second control terminal and the switching circuit selecting one of the first polarization antenna and the second polarization antenna, the radiation pattern of the first antenna device directs to a second direction; 
 wherein in response to the fifth switch element and the seventh switch element being turned on by the third control terminal and the switching circuit selecting one of the third polarization antenna and the fourth polarization antenna, a radiation pattern of the second antenna device directs to a third direction; and 
 wherein in response to the sixth switch element and the eighth switch element being turned on by the fourth control terminal and the switching circuit selecting one of the third polarization antenna and the fourth polarization antenna, the radiation pattern of the second antenna device directs to a fourth direction, and the first direction, the second direction, the third direction and the fourth direction are different from each other. 
 
     
     
       11. The antenna assembly according to  claim 1 , wherein the first polarization antenna is configured to operate in a first operating frequency band and a second operating frequency band, the second polarization antenna is configured to operate in a third operating frequency band and a fourth operating frequency band, a center frequency of the first operating frequency band is higher than a center frequency of the second operating frequency band, and a center frequency of the third operating frequency band is higher than a center frequency of the fourth operating frequency band;
 wherein a distance between the first reflection element and the first antenna is between one-eighth and one-fourth of a wavelength of the center frequency of the first operating frequency band, a distance between the second reflection element and the first antenna is between one-eighth and one-fourth of the wavelength of the center frequency of the first operating frequency band, a distance between the third reflection element and the second antenna is between one-eighth and one-fourth of a wavelength of the center frequency of the third operating frequency band, and a distance between the fourth reflection element and the second antenna is between one-eighth and one-fourth of the wavelength of the center frequency of the third operating frequency band.